I have not accessed our IPN.NET server in a while, but when I got to Configure IPN.NET Server to update some pricing, I get an error. The error is "Error: Server was unable to process request. - ...
All my testing prior to switching to a live PayPal Account, was working fine. This includes the IPN.NET test tool and Paypal's Sandbox(though the emailing of keys does not work through the Sandbox). ...